Removable blade linoleum knife



R. G. BENNETT July 20, 1954 2,684,250

REMOVABLE BLADE LINOLEUM KNIFE Fi-led Sept. 2, 1953 I INVENTOR. 066? flew M77 Fly. 2

Patented July 20, 1954 REMOVABLE BLADE LINOLEUM KNIFE Roger G. Bennett, Southbridge, Mass., assignor to Hyde Manufacturing Company, Southbridge, Mass., a corporation of Massachusetts Application September 2, 1953, Serial No. 378,070

This invention relates to a new and improved removable blade linoleum knife, but the invention may be applied to any knife or tool where the construction may be found useful or desirable; and in effect the invention concerns a new and improved handle fastener, or in other words a tool handle fastener for a removable blade of any kind.

The principal object of the invention resides in the provision of a novel, simple and effective means for holding the blade to the handle but which is in easily removable condition with respect thereto, and whereas this particular problem has engaged the attention of designers and inventors for many years, the present invention provides for an extremely simplified, inexpensive, and yet positively held'fastening device which not only provides the means required for holding the blade firmly and yet easily and quickly removable, but also provides against splitting the handle, turning of the blade in the handle, etc.

Further objects of the invention include the provision of a handle having a longitudinal bore therein part way therethrough and a new and improved plate or anvil located in said bore and having a construction whereby it is firmly and accurately wedged and thus held against extraction in the bore, said anvil providing an inclined surface at the leading end thereof for directing the entering end of the tool tang into a recess which is shaped to hold the tang firmly and against twisting, and said inclined surface being spaced from said recess by the body of the plate or anvil which provides a reaction surface for a transverse screw-type fastener holding the same in position, said fastener and said recess together cooperating to hold the blade against either lateral or endwise movement.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 is a view in elevation of a device according to the present invention;

Fig. 2 is a view, partly in section, showing the interior construction of the handle of Fig. 1;

Fig. 3 illustrates the blade completely removed from the handle;

Fig. 4 is a greatly enlarged view in elevation of the plate or anvil;

Fig. 5 is a view similar to Fig. 4 but partly in section and illustrating the relationship of the blade tank to the plate or anvil; and

Fig. 6 is a top plan view of the plate or anvil, looking in the direction of the arrow 6 in Fig. 4.

'7 Claims. (Cl. 279-83) Whereas this invention may be applied to any handle and any tool, it is herein illustrated as being applied to a linoleum knife which has a handle generally indicated by the reference numeral til and which may be of any material but is ordinarily made of wood. This handle may be of any shape desired, but in the illustration of the present invention, it is shown as being shaped to conform comfortably to the hand of the user.

This handle is provided with a reduced neck portion ii at one end thereof and there is a cylindrical bore M extending inwardly from the end of the handle to an intermediate point therein as shown in Fig. 2. The reduced neck 12 may be provided with a slotted ferrule or collar It usually of metal to finish the appearance of the tool, to provide a guide for the entrance end of the tang of the blade which is indicated at E8 and to prevent splitting of the reduced neck It and of the handle itself under conditions of use.

A novel plate or anvil which is illustrated in Figs. 4, 5 and 6 may be made of metal and is preferably die cast in a single piece. This plate or anvil comprises a generally cylindrical body indicated at 20, this body having oppositely po sitioned outwardly tapering fins 24 and 26, so that when the body 20 is driven into the cylindrical bore M, the fins will be impressed into the material of the handle in the cylindrical bore; and to prevent any extraction of the plate or anvil, the shoulders 28 tend to dig into the material of the handle and thus firmly and permanently anchor the plate or anvil in the desired location as shown in Fig. 2. In insertion, a pin or plunger (not shown) can be used as a depth gauge to accurately locate the plate or anvil at the desired depth in the bore.

The body 20 at one side of a diameter thereof is provided with an upstanding portion 30 which is substantially semi-circular in section, although the flat longitudinal face thereof at 32 preferably lies to one side of the diameter of the member 20. This portion 36 terminates in an inclined surface 34, which leads down from a point 36 located adjacent the wall of the bore M. In fact, the entire curved surface of the member 30 coincides with the walls of the bore 14 and the curvature of the portion 38 corresponds substantially with the curvature of the bore.

At the base of the member 30, the body 20 is provided with a substantially fiat transverse face 31 which is separated from the base of the portion 30 by a recess or trough 38 preferably having a curved edge at 49 as shown in Fig. 5 at the side opposite the longitudinal flat face 32.

The tang T of the tool is entered into the bore through the slot in the top of the ferrule 15 and it engages the inclined surface 3%, so that it is thus automatically aligned to provide flat contact of one flat side surface thereof with the longitudinal flat surface at 32 of the portion 30 as clearly shown in Fig. 5. Descending as far as it is able to do, the tang is finally guided into and seated into the trough 38, the rounded off corner 40 assisting in ensuring the final location of the end 18 of the tang in this trough so that absolutely no twist of any kind is possible once the tang is seated as described. A set-screw or other fastener indicated at 42 is employed to bear against the tang of the tool and clamp it against the fiat surface 32 of the plate or anvil. If desired, a screw-threaded member may be applied to the bore for the fastener 42 so as to provide metallic screw-threads and such member will of course be solidly anchored in the material of the handle.

It will be seen that this invention provides a very simple tool handle fastener of the class described which is simple and inexpensive to manufacture and assemble and which will hold the tool in absolutely fixed condition as long as desired, but which upon merely backing off fastener G2 to a slight extent will allow withdrawal of the tool and replacement thereof. The main portion of the device is the novel plate or anvil of Figs. 4, 5 and 6 and this is a simple inexpensive member which may be cheaply manufactured as by die casting, and complicated springs, gripping members, or the like formerly necessary to hold the tool in the position disclosed, are completely avoided.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. A device of the class described comprising a handle, a bore therein, a member located in said bore, said member comprising a body, means thereon gripping the side walls of the bore, a portion on the body extending toward the entrance of the bore, said portion including an inclined leading edge surface guiding a tang of a tool toward the main body, and means provided in said body for receiving the leading end of the tang and seating the same in non-twisting con-- dition therein, and a separate fastener in the handle clamping the tang against said portion.

2. A device of the class described comprising a handle, a bore therein, a member located in said bore, said member comprising a main body, means thereon gripping the side walls of the bore, a portion on the body extending toward the entrance of the bore, said portion including an inclined leading edge surface guiding a tang of a tool toward the main body, and means provided in said body for receiving the leading end of the tang and seating the same in non-twisting condition therein, and a separate fastener in the handle clamping the tang against said portion, the latter having a flat longitudinal face for contact by the tang.

3. A device of the class described comprising a handle, a bore therein, a member located in said bore, said member comprising a main body, means thereon gripping the side walls of the bore, a portion on the body extending toward the entrance of the bore, said portion including an inclined leading edge surface guiding a tang of a tool toward the main body, and means provided in said body for receiving the leading end of the tang and seating the same in non-twisting condition therein, and a separate fastener in the handle clamping the tang against said portion, the latter having a flat longitudinal face for contact by the tang between the main body and the inclined surface.

4. A device of the class described comprising a handle, a bore therein, a member located in said bore, said member comprising a main body, means thereon gripping the side walls of the bore, a portion on the body extending toward the entrance of the bore, said portion including an inclined leading edge surface guiding a tang of a tool toward the main body, and means provided in said body for receiving the leading end of the tang and seating the same in non-twisting condition therein, and a separate fastener in the handle clamping the tang against said portion, the latter having a fiat longitudinal face for contact by the tang, and said last-named means comprising a recess for the tang end in the main body, said recess being located at the base of the said longitudinal face and diametrically of the main body.

5. A device of the class described comprising a handle, a bore therein, a member located in said bore, said member comprising a main body, means thereon gripping the side walls of the bore, a portion on the body extending toward the entrance of the bore, said portion including an inclined leading edge surface guiding a tang of a tool toward the main body, and means provided in said body for receiving the leading end of the tang and seating the same in non-twisting condition therein, and a separate fastener in the handle clamping the tang against said portion, the latter having a fiat longitudinal face for contact by the tang, and said last-named means comprising a recess for the tang end in the main body, said recess being located at the base of the said longitudinal face and diametrically of the main body and a rounded edge for the recess opposite the longitudinal face of the portion.

6. A plate for securement of a tool to a handle comprising a one-piece main body and elongated extending portion, the body being generally cylindrical and the elongated portion extending axially therefrom at one side of a diameter thereof, said elongated portion being substantially semi-circular in section having a longitudinal fiat face facing the main body diameter and a curved exterior surface in prolongation of a part of the surface of the main body, said elongated portion terminating in an inclined leading edge extending angularly in a direction toward the main body from the curved exterior surface of the extending portion, said inclined leading edge intersecting the said longitudinal fiat face.

'7. The plate of claim 6 including means forming a fiat-sided recess in the main body at the surface thereof adjacent the flat face of the said extending portion, one fiat side of the recess being co-planar and continuous with respect to the said fiat face of the extending portion.

Number Name Date Fegley at al Oct. 15, 1912 A 

